Answer 2 is wrong because at the place where the road intersects at the same level (junction, intersection, crossroads, intersection , where there is a roundabout ...) turn around.
At pedestrian crossings, narrow roads, ramps, and curves, visibility is obscured.
At the place where the road intersects at the same level.
On bridges, bridgeheads, underpasses, underground, in road tunnels, highways, at places where roads intersect at the same level with railways.